docs: def _read_hypocentre_from_ndk_string(self, linestring):
          """
          Reads the hypocentre data from the ndk string to return an
          instance of the GCMTHypocentre class
          """
          hypo = GCMTHypocentre()
          hypo.source = linestring[0:4]
          hypo.date = _read_date_from_string(linestring[5:15])
          hypo.time = _read_time_from_string(linestring[16:26])
          hypo.latitude = float(linestring[27:33])
          hypo.longitude = float(linestring[34:41])
          hypo.depth = float(linestring[42:47])
          magnitudes = [float(x) for x in linestring[48:55].split(' ')]
          if magnitudes[0] > 0.:
              hypo.m_b = magnitudes[0]
          if magnitudes[1] > 0.:
              hypo.m_s = magnitudes[1]
          hypo.location = linestring[56:]
          return hypo